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Jan
12

How do GPS satellites stay in perfect position with out drifting out of position in time?

By 10 Comments

By 10 Comments

Another Reader question about GPS Satellite positioning, from PeterD: Seems that no matter how perfectly positioned these GPS satellites are they would drift out of position and that would throw off the computations of our GPS units in cars etc.

Dec
20

Does the iphone gps work outside of at&t service range?

By 1 Comment

By 1 Comment

Another great question, from algidstorm about using your iPhone as a GPS if you discontinue your service with AT&T: My friend has an iphone, but his contract is up. I was wondering if the gps will still work, or if he needs to renew his contract for it to work.